WO2010048756A1 - 潜油直线电机 - Google Patents

潜油直线电机 Download PDF

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Publication number
WO2010048756A1
WO2010048756A1 PCT/CN2008/072886 CN2008072886W WO2010048756A1 WO 2010048756 A1 WO2010048756 A1 WO 2010048756A1 CN 2008072886 W CN2008072886 W CN 2008072886W WO 2010048756 A1 WO2010048756 A1 WO 2010048756A1
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WO
WIPO (PCT)
Prior art keywords
stator
ring
linear motor
arc
hoop
Prior art date
Application number
PCT/CN2008/072886
Other languages
English (en)
French (fr)
Inventor
王新忠
高云峰
付晓辉
王光能
王国元
Original Assignee
深圳市大族精密机电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市大族精密机电有限公司 filed Critical 深圳市大族精密机电有限公司
Priority to CN2008800003638A priority Critical patent/CN101601181B/zh
Priority to PCT/CN2008/072886 priority patent/WO2010048756A1/zh
Publication of WO2010048756A1 publication Critical patent/WO2010048756A1/zh

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/132Submersible electric motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/06Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K41/00Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02Linear motors; Sectional motors
    • H02K41/03Synchronous motors; Motors moving step by step; Reluctance motors

Definitions

  • the present invention relates to a submersible linear motor, and in particular to a submersible linear motor for oil well working.
  • the known oil pumping equipment is mainly a beam pumping unit-pumping pump unit. The entire unit is divided into the ground, the downhole and the intermediate part of the ground and downhole, but they are all mechanically oiled. Due to the complicated and variable mining conditions of oil wells, with the increasing depth and output, the shortcomings of such pumping units are heavy and the accidents are very obvious. The shortcomings are as follows:
  • the system is complex: the main modules of the system are separated, the system coordination is very poor, and it is not convenient to control together. Because the submersible linear motor can directly convert electric energy into linear reciprocating motion without intermediate transmission structure, whether the pumping unit is modified in the well or underground, it is beneficial to reduce the transmission space size and improve the machine utilization efficiency. details as follows:
  • the submersible linear motor is mainly a linear motion of the mover in the stator.
  • the structure is very simple, the system efficiency is higher than that of the traditional system, so energy saving; because there is no long sucker rod, gear reduction and beam, etc.
  • the system efficiency is greatly enhanced; the average energy saving is 50%, saving a lot of energy.
  • Non-biased grinding Since there is no long sucker rod, there is no eccentric wear problem, and the reliability of the system is greatly enhanced.
  • the system is simple, the system main module submersible oil submersible linear motor and submersible pump are integrated into one, the system coordination is very good, easy to achieve intelligent control.
  • the use of submersible linear motors to extract oil has many requirements for the stator of submersible linear motors: First, it is necessary to take sealing measures, such as the submersible oil submersible linear motor working under the oil well, the inside of the stator can not penetrate into water, oil, etc. Miscellaneous, otherwise the coil components energized in the stator will not work properly or even damage the motor. Therefore, it is especially important to optimize the sealing performance of the stator for submersible linear motors.
  • a submersible linear motor includes a stator and a mover linearly moving in the stator, the stator including a stator inner tube and sleeved outside the stator inner tube a stator outer tube and a plurality of silicon steel rings and coils disposed between the stator outer tube and the stator inner tube and arranged along an axial direction thereof, wherein the stator outer tube and the stator inner tube Filled with solid insulation material.
  • the insulating material is an epoxy resin.
  • the coil has an insulative housing. Also included is at least one joint disposed at the end of the outer tube of the stator and the inner tube of the stator, the joint being tightly fitted with the outer tube of the stator and the inner tube of the stator to form a sealed cavity between the three.
  • a seal ring is disposed at a joint of the joint with the outer tube of the stator and the inner tube of the stator.
  • An annular groove is formed in at least one of the circumferential surfaces of the joint respectively contacting the stator inner tube and the outer stator tube, and the sealing ring is located in the annular groove.
  • a first screw hole is formed in an end surface of the outer tube of the stator, and a slot is formed in a side portion of the joint, and the first slot of the stator is provided with a first slot corresponding to the first screw hole and communicating with the slot Through hole.
  • a gasket of glue is disposed between the outer tube of the stator and the joint. At least one of the joint between the joint and the outer circumferential surface of the stator outer tube and the contact portion between the joint and the inner circumferential surface of the stator inner tube are welded to each other in a seamless state.
  • the method further includes a first limiting ring disposed between the outer tube of the stator and the inner tube of the stator, the first limiting ring being fastened on the inner tube of the stator for the silicon steel ring Limit the position with the coil.
  • the first limiting ring includes a first hoop arc and a second hoop arc whose sum of the arcs is slightly smaller than the full arc degree, and the first and second hoop arcs are fixedly engaged to be hooped in the stator inner tube on.
  • a side portion of the first hoop arc is provided with a second through hole communicating with an end portion thereof, and a corresponding end portion of the second hoop arc is provided with a second screw hole passing through the second through hole and A second screw that is locked on the second screw hole fixes the first hoop arc and the second hoop arc.
  • the mover comprises a shaft, a permanent magnet ring, a magnetic flux ring and a second limit ring, the permanent magnet ring and the magnetic flux ring array are arranged on the shaft, and the second limit ring is fastly mounted On the shaft, it is used to axially limit the permanent magnet ring and the magnetic flux ring on the shaft.
  • the second limiting ring includes a third hoop arc, a fourth hoop arc, and the arc of the third hoop arc and the fourth hoop arc is slightly smaller than the entire arc, the third hoop arc and the third The four hoop arcs are fixedly engaged to tighten the shaft.
  • the third hoop arc is provided with a fourth through hole communicating with the outer side portion and the end portion, and the corresponding end portion of the fourth hoop arc is provided with a fourth screw hole passing through the fourth through hole and A fourth screw locked to the fourth screw hole securely engages the third hoop arc and the fourth hoop arc.
  • the mover further comprises a bearing, the bearing is sleeved on the shaft, and an outer diameter of the bearing is larger than an outer diameter of the permanent magnet ring, the magnetic flux ring and the second limit ring.
  • the bearing comprises a plastic bearing and a magnetically permeable bearing, and the plastic bearing is sleeved on the outer ring of the magnetic bearing.
  • at least one of the magnetic flux ring and the second limiting ring has an outer diameter larger than an outer diameter of the permanent magnet ring.
  • a compression nut is further included, the end of the shaft being provided with a thread, and the compression nut is locked on the thread.
  • the shaft is hollow.
  • the beneficial technical effect of the present invention is:
  • the submersible linear motor of the present invention works under the oil well and is connected with the oil pump. Since the submersible linear motor of the present invention is filled with solid insulating material between the outer tube of the stator and the inner tube of the stator, Thereby ensuring the high insulation and sealing effect of the coil components inside the stator, blocking the entry of external oil, water, etc., and ensuring that the mover located inside the stator moves up and down linearly in an unobstructed condition to ensure the submersible linear motor Normal and stable work.
  • the submersible linear motor of the present invention is provided with a joint at the end of the positioning inner tube and the positioning outer tube of the stator, the joint is tightly fitted with the inner tube of the stator and the outer tube of the stator through the sealing ring and formed together with the inner and outer tubes of the stator.
  • a closed chamber further ensures the sealing performance of the components disposed between the inner tube of the stator and the outer tube of the stator.
  • the stator generates a primary traveling wave magnetic field through the silicon steel ring and the coil, and interacts with the mover to generate electromagnetic thrust.
  • the mover moves up and down linearly in the stator, and then acts on the oil pump, and the underground crude oil can be continuously pumped through the oil pump.
  • FIG. 1 is a schematic structural view of a submersible linear motor according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a stator of a submersible linear motor according to an embodiment of the present invention
  • FIG. 3 is a perspective view of a joint portion of FIG.
  • Figure 4 is a partial enlarged view of the inner and outer tube assembly of the joint of Figure 2;
  • Figure 5 is a partial enlarged view of one end of the stator drawn motor line of Figure 2;
  • Figure 6 is the first limit of Figure 2
  • Figure 7 is a perspective view of the first hoop arc of the first limit ring;
  • Figure 8 is a perspective view of the second hoop arc of the first limit ring;
  • Figure 9 is a specific embodiment of the present invention Schematic diagram of the structure of the mover;
  • Fig. 10 is a schematic view showing the structure of the bearing of Fig. 9. BEST MODE FOR CARRYING OUT THE INVENTION
  • the present invention will be further described in detail by way of specific embodiments and with reference to the accompanying drawings.
  • the present invention mainly relates to a submersible linear motor for oil well working, which can pump crude oil under the ground to the ground, and the linear motor includes a stator 1 (generally primary) and The stator 2 is a mover 2 (generally a secondary) that moves up and down linearly.
  • the stator 1 includes a stator outer tube 9, a stator inner tube 11, a plurality of silicon steel rings 15 and a plurality of coils 14 arranged in an array, and two annular joints 10, wherein the stator outer tube 9 and the stator inner tube 11 can be used.
  • the coil 14 is annular.
  • the multi-section silicon steel ring 15 and the plurality of coils 14 arranged in the array are axially sleeved between the outer tube 9 of the stator and the tube body of the inner tube 11 of the stator, and are sleeved on the inner tube 11 of the stator, and the silicon steel rings 15 and coils are respectively arranged.
  • 14 are arranged in an interdigitated manner along the axial direction.
  • the coils 14 arranged in the array are arranged in a three-phase arrangement in a star or delta connection. As shown in FIG. 2-4, each joint 10 is disposed at one end of the stator outer tube 9 and the stator inner tube 11, and the joint 10 is tightly fitted with the stator outer tube 9 and the stator inner tube 11 at the joint 10 and the stator.
  • An inner circumferential surface of the inner tube 11 and an outer circumferential surface of the joint 10 and the outer tube 9 are provided with an annular groove 103.
  • the groove 103 is provided with a sealing ring 12.
  • the sealing ring 12 is 0. Type ring. Since the sealing ring 12 is provided between the joint 10 and the stator outer tube 9 and the stator inner tube 11, respectively, the joint 10 is tightly fitted with the stator outer tube 9 and the stator inner tube 11 to form between the three.
  • the cavity is sealed to block the entry of impurities such as external oil and water, and the working environment of the silicon steel ring 15 and the toroidal coil 14 in the cavity is ensured. As shown in FIG.
  • a ring-shaped gasket 17, such as a glue, is also interposed between the outer stator 9 and the joint 10, and the annular gasket 17 can be a third screw (not shown). It passes through and is clamped between the outer tube 9 of the stator and the joint 10 to further ensure the sealing effect of the sealed chamber.
  • the joint portion 22 of the joint 10 with the outer peripheral surface of the stator outer tube 9 and the contact portion 23 between the joint 10 and the outer peripheral surface of the stator inner tube 11 are welded to each other.
  • the joint 10 includes two sections having different outer diameters, forming a step, and the top portion 10a of the step, that is, the portion having a small outer diameter is inserted into the stator inner tube 11 and the outer stator tube 9 Between the respective ends, the bottom portion 10b of the step, that is, the portion having a large outer diameter, abuts against the corresponding end of the outer tube 9 of the stator.
  • the outer tube 9 of the stator is topped by the joint 10
  • a first screw hole 91 is defined in the end surface of the joint, and a slot 101 is formed in a side portion of the joint 10, and a bottom portion 10b of the step of the joint 10 is opposite to the first through hole 105 communicating with the sinking groove 101.
  • a first screw (not shown) passes through the first through hole 105 and locks the first screw hole 91, and the stator outer tube 9 and the joint 10 are tightly engaged by the screw locking force, thereby ensuring the sealing of the chamber. performance.
  • the coil 14 is cured with a high insulating rubber or plastic to form a casing of high strength and high insulation properties.
  • a solid insulating material 29 such as high insulating rubber or plastic is filled between the stator outer tube 9 and the stator inner tube 11, and the insulating material 29 is an epoxy resin which is formed to cover the coil 14 and the silicon steel ring 15.
  • the designation of the insulating material 29 in the figure is only a schematic indication at one location, and in fact the insulating material is filled between the outer stator tube 9 and the inner stator tube 11. Since the submersible linear motor of the present invention is filled with a solid insulating material 29 between the outer stator tube 9 and the inner stator tube 11, the schematic view of the insulating material 29 is simply illustrated in Fig. 2, in fact, the insulating material is filled in the outer tube 9 of the stator.
  • the stator inner tube 11 Between the stator inner tube 11 and not only the part shown in Fig. 2, the high insulation and sealing effect of the coil components inside the stator are ensured, and the entry of external oil, water and the like is further blocked, and the inside of the stator is further ensured.
  • the mover moves up and down linearly on the unobstructed condition to ensure the normal and stable operation of the submersible linear motor.
  • an outlet hole 106 is opened in a joint 10, and the motor winding lead 18 is provided. It is taken out from the outlet hole 106.
  • the outlet hole 106 can be opened in the axial direction.
  • connection end 21 of the motor winding lead 18 and the motor lead cable 20 is disposed in the outlet hole 106.
  • the connection end is solidified with screws or glue in the outlet hole 106 to ensure the connection strength and the sealing property of the joint.
  • the joint portion 201 of the motor lead-out cable 20 is connected to the control system. It is also possible to have a wire slot in a joint 10 from which the motor winding lead wire 18 is led out.
  • the internal thread 102 is provided in the annular joint 10, and the screw 13 is locked thereon, which can enhance the strength of the motor body.
  • the aforementioned closed chamber includes a plurality of first limiting rings 16 fastened on the stator inner tube 11 in addition to the silicon steel ring 15 and the coil 14 .
  • a limiting ring 16 positions the arrangement of the silicon steel ring 15 and the coil 14 in the axial direction of the stator inner tube 11 to ensure the arrangement requirements of the stator exciting elements, and at the same time ensures the pitch of each section, that is, the silicon steel ring of the stator 1 Pitch.
  • the first limit ring 16 can be a steel ring. In this case, the first limit ring 16 also participates in the magnetic circuit of the stator.
  • the first limiting ring 16 is disposed at a predetermined distance, and the first limiting ring 16 is also disposed at a position close to the two joints 10, and each of the first limiting ring 16 sides The portion is next to the silicon steel ring 15 or coil 14 to limit its activity.
  • the first limiting ring 16 is a pressure hoop composed of a first hoop arc 16a and a second hoop arc 16b, and the sum of the arcs of the first hoop arc 16a and the second hoop arc 16b. Slightly smaller than the full circle.
  • the first hoop arc 16a and the second hoop arc 16b are each substantially semi-annular.
  • the first hoop arc 16a is provided with a second through hole 162 communicating with the outer side portion and the end portion thereof, and the corresponding end portion of the second hoop arc 16b is provided with a second screw hole 163, and the second screw passes through the second
  • the through hole 162 is locked to the second screw hole 163 to fixedly connect the first hoop arc 16a and the second hoop arc 16b.
  • the first hoop arc 16a and the second hoop arc 16b are hooped on the stator inner tube 1 1 by the screw locking force.
  • the first stop ring 16 can be of other construction, such as a ring-shaped projection located on the inner tube 11 of the stator.
  • the stator inner tube 11 is a thin-walled steel pipe. Further, the stator inner tube 11 may be an integrated long tube or a plurality of short tubes may be connected in series.
  • the mover 2 includes a shaft 25, a permanent magnet ring 4, a magnetic flux ring 5, and a second limit ring 7.
  • the permanent magnet ring 4 and the array of magnetically permeable rings 5 are arranged on the shaft 25.
  • the second limiting ring 7 is fixed on the shaft 25 for axially limiting the permanent magnet ring 4 and the magnetic flux ring 5 on the shaft 25.
  • the second limiting ring 7 can keep the permanent magnet ring 4 and the magnetic flux ring 5 in the initial design position, and avoid the change of the polar moment caused by the movement of the permanent magnet ring 4 and the magnetic flux ring 5, thereby ensuring the normal movement of the mover. jobs. In addition, it avoids maintenance and inspection of the mover and saves costs.
  • the shaft 25 may be a steel tube
  • the magnetic flux ring 5 may be a steel ring
  • the material of the second limiting ring 7 may also be steel.
  • the number of the permanent magnet ring 4 and the magnetic flux ring 5 is determined according to the length of the shaft 25, the width of the permanent magnet ring 4 and the magnetic flux ring 5, and generally has a plurality of them.
  • the mover 2 further includes a bearing 6 that fits over the shaft 25.
  • the outer diameter of the bearing 6 is larger than the outer diameter of the permanent magnet ring 4, the magnetic flux ring 5, and the second limiting ring 7, and functions to protect the permanent magnet ring 4, the magnetic flux ring 5, and the second limiting ring 7.
  • the bearing 6 includes a plastic bearing 61 and a magnetic bearing 62, and the plastic bearing 61 is sleeved on the outer ring of the magnetic bearing 62.
  • the plastic bearing 61 is made of a polymer wear resistant material to reduce the friction coefficient.
  • the magnetic bearing 62 can be a steel bearing.
  • the second limiting ring 7 (the structure of the second limiting ring 7 is the same as that of the first limiting ring 16 and can be referred to FIG. 6-8) includes a third hooping arc 71 and a fourth hooping arc 72.
  • the pressure band, the curvature of the third hoop arc 71 and the fourth hoop arc 72 are slightly smaller than the full arc degree, and the third hoop arc 71 and the fourth hoop arc 72 are fixedly engaged to be hooped on the shaft 25 .
  • the third hoop 71 and the fourth hoop 72 are substantially semi-annular.
  • the third hoop 71 is provided with a fourth through hole 73 communicating with the outer portion and the end portion, and the fourth end of the fourth hoop 72 is provided with a fourth screw hole 74, a fourth screw (not shown) Passing through the fourth through hole 73 and locking on the fourth screw hole 73
  • the third hoop 71 and the fourth hoop 72 are fixedly joined.
  • the user can design three or more hoops to form a complete limit ring as needed. As long as the arc of these hoops is slightly smaller than the full arc.
  • the second limiting ring 7 can also be of other construction, such as by a ring-shaped projection on the moving shaft. As shown in FIG.
  • the outer diameter of at least one of the magnetic flux ring 5 and the second limiting ring 7 is slightly larger than the outer diameter of the permanent magnet ring 4.
  • at least one of the magnetic flux ring 5 and the second limiting ring 7 can provide protection for the permanent magnet ring 4 as shown in FIG. 9.
  • the mover 2 A compression nut 8 is also included, the end of the moving shaft being provided with a thread 3, the compression nut being locked on the thread 3. The compression nut can ensure the locking force of the permanent magnet ring 4, the magnetic flux ring 5, the second limit ring 7 and the bearing 6 on the shaft 25. As shown in FIG.
  • the second limit ring 7 may be provided in plurality, and each of the second limit rings 7 is uniformly fixed on the shaft 25. That is, a second limiting ring 7 is disposed on the shaft 25 at a predetermined distance, and a first limiting ring 16 is also disposed near the compression nut 8 to further strengthen the permanent magnet ring 4 and the magnetic flux ring 5.
  • Axial limit As shown in Fig. 9, the moving shaft is hollow, so as to enhance the strength, the submersible breathing or directly as a part of the oil passage.
  • the thread 3 can also be used to connect the plunger assembly of the oil pump.
  • the internal thread 102 on the joint 10 can also be used to connect the pump assembly of the oil pump.
  • the working principle of the above-mentioned submersible linear motor is as follows: Since the submersible linear motor of the present invention operates under the oil well and is connected to the oil pump.
  • the invention is provided with a joint at the end of the positioning inner tube and the outer tube of the stator, and the joint is tightly fitted with the inner tube of the stator and the outer tube of the stator through the sealing ring, and forms a closed chamber together with the inner and outer tubes of the stator.
  • the sealing performance of the silicon steel ring and the coil disposed between the inner tube of the stator and the outer tube of the stator is ensured.
  • the coil 14 of the stator 1 When the coil 14 of the stator 1 is connected to the three-phase coil, the coil 14 and the silicon steel ring 15 disposed therewith will generate a stator traveling wave magnetic field, and interact with the mover 2 to convert electromagnetic energy into mechanical energy, generating thrust to move the mover. 2 Move up and down in the stator 1.
  • the underground crude oil can be continuously pumped into the oil suction pipe through the oil pump, and is transported from the oil suction pipe to the ground device.
  • This invention The submersible linear motor keeps the stator completely sealed and blocks the entry of external oil, water, etc., thus ensuring that the mover inside the stator moves up and down without hindrance, because there is no need for a traditional long sucker rod.
  • the submersible linear motor of the invention is filled with a solid insulating material between the outer tube of the stator and the inner tube of the stator, thereby ensuring high insulation of the coil components inside the stator and ensuring normal and stable operation of the submersible linear motor.
  • the above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description.
  • the stator of the present invention can be used not only as a stator of a submersible linear motor, but also as a stator filled with an insulating material of any linear motor that needs to seal a coil portion in the stator. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Linear Motors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

潜油直线电机 技术领域 本发明涉及一种潜油直线电机, 具体涉及一种用于油井下工作的潜油直线电机。 背景技术 公知的抽油设备主要是梁式抽油机-抽油泵装置, 整套设备分为地面、 井下和联系 地面和井下的中间部分, 但其都是机械采油。 由于油井开采条件复杂多变, 随着井深 和产量的不断增加, 这种抽油机重量大、 事故多的缺点变得非常明显, 其缺点具体如 下:
1、高耗能:传统机械采油由于机械结构很复杂,电机功率因数很低,一般要 20%-50% 之间; 又由于要有长的抽油杆, 抽油杆每 1000米上下抽动时约有 0. 6-1. 2米的弹性形 变,严重影响到系统效率。
2、 容易产生偏磨: 由于大多油田的井深都在千米以上, 抽油杆被磨断时的发生, 严重影响了系统的可靠性。
3、 不环保, 噪声大; 在海上采油时由于原油外泄, 会造成原油对海洋的污染。
4、 系统复杂: 系统主要模块各自分开, 系统协调性很差, 并且不便一起控制。 由于潜油直线电机能够将电能直接转化为直线往复运动而不需要中间传动结构, 无论是在井上还是井下对抽油机进行改造, 均有利于减少传动机构空间尺寸, 提高机 采效率, 其优点具体如下:
1、 节少能源: 潜油直线电机主要是动子在定子内作直线运动, 其结构很简单, 系 统效率相对传统系统高, 因此节能; 由于没有长的抽油杆、 齿轮减速和游梁等, 系统 效率大大增强; 平均节能达 50%, 节省了大量能源。
2、 无偏磨: 由于没有长的抽油杆, 也就没有了偏磨问题了, 系统的可靠性大大增 强。
3、 由于电机在地下, 所以噪声小; 在海上采油时由于没有外漏, 不会造成原油对 海洋的污染。
4、 系统简单, 系统主要模块潜油潜油直线电机与潜油泵装成一体, 系统协调性很 好, 便于实现智能控制。 但利用潜油直线电机来开采石油, 对潜油直线电机的定子存在许多要求: 首先是 需要采取密封措施, 例如在油井下工作的潜油潜油直线电机, 其定子内部不能渗入水、 油等杂物, 否则定子内通电的线圈部件无法正常工作乃至使电机损坏。 因此对于潜油 直线电机来说, 优化其定子的密封性能尤其重要。 发明内容 本发明的主要目的就是提供一种密封性能好、 避免采油时存在外漏的可能性、 工 作效率高的潜油直线电机。 为实现上述目的, 本发明采用以下技术方案: 一种潜油直线电机, 包括定子及在该定子内作直线运动的动子, 所述定子包括定 子内管、 套设在所述定子内管外的定子外管以及设置于所述定子外管和所述定子内管 之间并沿其轴向排布的复数节硅钢环和线圈, 其特征在于,所述定子外管和所述定子内 管之间填充有固体绝缘材料。 优选地: 所述绝缘材料为环氧树脂。 所述线圈具有绝缘外壳。 还包括设置于所述定子外管和定子内管端部的至少一接头, 所述接头与所述定子 外管和定子内管紧配合以在三者之间形成密封腔。 在所述接头分别与定子外管与定子内管的接合处均设有密封圈。 在所述接头分别与所述定子内管及定子外管相接的周面的至少一者上开设有环形 槽, 所述密封圈位于该环形槽内。 所述定子外管的端面开设有第一螺孔, 所述接头的侧部开设有沉槽, 所述沉槽内 开设有与所述第一螺孔对应、 并连通所述沉槽的第一通孔。 所述定子外管与接头间设有胶类的垫片。 所述接头与定子外管的外周面的相接部位以及所述接头与定子内管的内周面的相 接部位至少一者焊接成无缝状态。 优选地, 还包括设置于所述定子外管和定子内管之间的第一限位环, 所述第一限 位环紧固安装在所述定子内管上, 用于对所述硅钢环和线圈进行限位。 优选地, 所述第一限位环包括弧度之和略小于整圆弧度的第一箍弧和第二箍弧, 所述第一、 二箍弧固定接合以紧箍在所述定子内管上。 优选地, 所述第一箍弧的侧部开设有连通其端部的第二通孔, 所述第二箍弧的相 应端部开设有第二螺孔, 穿过所述第二通孔并锁付在所述第二螺孔上的第二螺丝将所 述第一箍弧和第二箍弧固接。 优选地, 所述动子包括轴、 永磁环、 导磁环和第二限位环, 所述永磁环和导磁环 阵列排布在轴上, 所述第二限位环固紧安装在轴上, 用于对轴上的永磁环和导磁环进 行轴向限位。 优选地, 所述第二限位环包括第三箍弧、 第四箍弧, 所述第三箍弧和第四箍弧的 弧度和略小于整圆弧度, 所述第三箍弧和第四箍弧固定接合以紧箍在所述轴上。 优选地, 所述第三箍弧上设有连通外侧部和端部的第四通孔, 所述第四箍弧的相 应端部设有第四螺孔, 穿过所述第四通孔并锁紧在所述第四螺孔上的第四螺丝将所述 第三箍弧和第四箍弧固定接合。 优选地, 所述动子还包括轴承, 所述轴承套在轴上, 所述轴承的外径比永磁环、 导磁环、 第二限位环的外径大。 优选地, 所述轴承包括塑胶轴承和导磁轴承, 所述塑胶轴承套在导磁轴承外圈。 优选地, 所述导磁环、 第二限位环中至少一者的外径比永磁环的外径大。 优选地, 还包括压紧螺母, 所述轴的端部设有螺纹, 所述压紧螺母锁紧在所述螺 纹上。 优选地, 所述轴为中空式。 本发明有益的技术效果是: 本发明的潜油直线电机在油井下工作, 并与抽油泵连接, 由于本发明的潜油直线 电机在定子外管和定子内管之间填充有固体绝缘材料,从而确保了定子内部线圈部件 的高绝缘性和密封效果, 阻隔了外部油、 水等的进入, 更加保证了位于定子内部的动 子在无妨碍的条件上作上下直线运动, 保证潜油直线电机的正常稳定工作。 由于本发明的潜油直线电机通过在其定子的定位内管、定位外管端部设置有接头, 该接头通过密封圈与定子内管、 定子外管紧配合并与定子内、 外管共同形成一密闭腔 室, 进一步确保了对设置于定子内管、 定子外管之间的元件的密封性能。 定子通过硅 钢环和线圈产生初级行波磁场, 与动子相互作用产生电磁推力, 动子在定子内作上下 直线运动, 进而作用在抽油泵上, 可将地下原油通过抽油泵被源源不断抽到抽油管内, 并从抽油管输送到地面装置内; 本潜油直线电机的定子在完全密封的情况下, 阻隔了 外部油、 水等的进入, 从而保证了位于定子内部的动子在无妨碍的条件下作上下运动, 由于无需传统的长的抽油杆, 大大提高了系统工作效率。 附图说明 图 1为本发明具体实施方式的潜油直线电机的结构示意图; 图 2为本发明具体实施方式的潜油直线电机的定子的结构示意图; 图 3为图 2中接头部分的立体示图; 图 4为图 2中接头与定子内、 外管装配的局部放大示图; 图 5为图 2中定子引出电机线的一端的局部放大示图; 图 6为图 2中第一限位环的立体示图; 图 7为第一限位环的第一箍弧的立体示图; 图 8为第一限位环的第二箍弧的立体示图; 图 9为本发明具体实施方式的动子的结构示意图; 图 10为图 9中的轴承的结构示意图。 具体实施方式 下面通过具体的实施方式并结合附图对本发明做进一步详细说明。 如图 1、 2所示, 本发明主要涉及一种用于油井下工作的潜油直线电机, 可将位 于地面下的原油泵到地面, 本直线电机包括定子 1 (一般为初级)和在该定子 1内作上 下直线运动的动子 2 (—般为次级)。 所述定子 1包括定子外管 9、 定子内管 11、 阵列排布的多个硅钢环 15及多个线圈 14、 以及两个环形接头 10, 其中, 定子外管 9和定子内管 11可采用钢管, 所述线圈 14为环形。 阵列排布的多节硅钢环 15和多个线圈 14轴向套设在定子外管 9和定子内管 11管 体之间, 并环套在定子内管 11上, 且各硅钢环 15和线圈 14沿轴向以相互交错的形式 排布。 阵列排布的线圈 14按三相排列成星形或三角形连接线圈。 如图 2-4所示, 每一接头 10设置于定子外管 9、定子内管 11的一个端部, 所述接 头 10与定子外管 9、定子内管 11紧配合,在接头 10与定子内管 11相接的内周面以及 接头 10与定子外管 9相接的外周面上均开设有环形槽 103,槽 103内装配有密封圈 12, 本实施例中, 该密封圈 12为 0型环。 由于在接头 10分别与定子外管 9及定子内管 11 之间均设有密封圈 12, 从而所述接头 10与所述定子外管 9和定子内管 11紧配合以在 三者之间形成密封腔, 以阻隔外部油、 水等杂质的进入, 保证了腔体内的硅钢环 15和 环形线圈 14工作环境。 如图 4所示, 在进一步优选的实施例中, 在定子外管 9和接头 10之间还装有例如 胶类的环形垫片 17, 该环形垫片 17可由第三螺丝(图未示)穿过并被夹紧在定子外管 9和接头 10之间, 进一步确保密封腔的密封效果。 如图 1所示, 优选的实施例中, 将接头 10与定子外管 9的外周面的相接部位 22, 以及接头 10与定子内管 11的外周面的相接部位 23进行焊接, 使其成为无缝状态, 其 可采用焊接性极佳的激光焊或氩弧焊, 也可以采用其它焊接方式, 也保证了定子 1在 密封的环境。 如图 1-5所示, 优选的实施例中, 接头 10包括外径不同的两段, 形成台阶, 该台 阶的顶部 10a, 即外径小的部分插入定子内管 11和定子外管 9的相应端之间, 该台阶 的底部 10b即外径大的部分顶抵定子外管 9的相应端。优选在定子外管 9受接头 10顶 抵的端面开设有第一螺孔 91, 接头 10的侧部开设有沉槽 101, 接头 10的台阶的底部 10b对应该第一螺孔 91开设有连通该沉槽 101的第一通孔 105, 第一螺丝 (图未示) 穿过该第一通孔 105并锁紧该第一螺孔 91上,通过螺丝锁紧力使定子外管 9和接头 10 间紧密接合, 确保了腔室的密封性能。 如图 2所示, 为增强绝缘性能与强度, 线圈 14用高绝缘胶类或塑料类固化, 形成 高强度与高绝缘性能的外壳。在定子外管 9和定子内管 11之间填灌如高绝缘胶或塑料 等固体绝缘材料 29, 该绝缘材料 29为环氧树脂,其成形后覆盖住线圈 14和硅钢环 15。 图中对绝缘材料 29的标示仅为在一个位置的示意性标示, 实际上绝缘材料填充于定子 外管 9和定子内管 11之间各处。 由于本发明的潜油直线电机在定子外管 9和定子内管 11之间填充有固体绝缘材料 29,图 2中只是简单示意了绝缘材料 29的示意图, 其实绝缘材料是填充在定子外管 9 和定子内管 11之间, 不仅仅只是图 2示意的一部分, 从而确保了定子内部线圈部件的 高绝缘性和密封效果, 进一步阻隔了外部油、 水等的进入, 更加保证了位于定子内部 的动子在无妨碍的条件上作上下直线运动, 保证潜油直线电机的正常稳定工作。 如图 2所示, 为了使外部的控制系统 (图未示) 能通过本潜油直线电机的引出电 缆线 20控制电机运动, 在一个接头 10中开有出线孔 106, 电机卷线引出线 18从该出 线孔 106引出。 所述出线孔 106可沿轴向开设。 电机卷线引出线 18与电机引出电缆线 20的连接端 21设置在出线孔 106内,优选在出线孔 106内将该连接端用螺丝或胶固化, 从而确保接线强度与连接处的密封性。 如图 2所示, 电机引出电缆线 20的接头部 201 连接控制系统。 也可在一个接头 10中开有出线槽, 电机卷线引出线 18从该出线槽引 出。 如图 2所示, 在环形接头 10内设置的内螺纹 102, 其上锁付螺丝 13, 这样可以增 强电机本体强度。 如图 1所示, 优选的实施例中, 前述的密闭腔室内除了具有硅钢环 15和线圈 14 之外, 还包括紧固安装在定子内管 11上的多个第一限位环 16, 第一限位环 16对硅钢 环 15和线圈 14在定子内管 11轴向上的排列起定位作用, 保证定子励磁元件的布置要 求, 同时可确保每段槽距, 也即定子 1的硅钢环 15的间距。 第一限位环 16可采用钢 环, 此种情况下, 第一限位环 16也参与定子的磁路。 优选地, 每隔规定距离均设置第 一限位环 16, 并在靠近两接头 10的位置也各设置第一限位环 16, 各第一限位环 16侧 部紧接硅钢环 15或线圈 14以限制其活动。 如图 6-8所示, 进一步地, 第一限位环 16为由第一箍弧 16a和第二箍弧 16b组成 的压箍, 第一箍弧 16a和第二箍弧 16b的弧度之和略小于整圆的弧度。 优选第一箍弧 16a和第二箍弧 16b大体上均呈半圆环状。其中,所述第一箍弧 16a上设有连通其外侧 部和端部的第二通孔 162, 第二箍弧 16b的相应端部开设有第二螺孔 163, 第二螺丝穿 过第二通孔 162并锁紧在第二螺孔 163上, 以固定连接第一箍弧 16a和第二箍弧 16b。 这样, 即通过螺丝锁紧力将第一箍弧 16a、 第二箍弧 16b紧箍在定子内管 1 1上。 在另外的实施例中, 第一限位环 16也可以是其他结构, 如由位于定子内管 11上 的圈状凸起构成。 为确保机械强度, 定子内管 11采用薄壁式钢管。 另外, 定子内管 11既可以是一 体化的长管, 也可以是由多根短管分段相接构成。 如图 9所示, 所述动子 2, 包括轴 25、 永磁环 4、 导磁环 5、 第二限位环 7。 所述 永磁环 4和导磁环 5阵列排列在轴 25上。 所述第二限位环 7固定在轴 25上, 用于对 轴 25上的永磁环 4和导磁环 5进行轴向限位。所述第二限位环 7可以使永磁环 4和导 磁环 5保持在初始设计位置上, 避免永磁环 4和导磁环 5发生挪动造成的极矩变化, 从而保证动子的正常工作。 进而避免对动子的维修、 检测, 节约费用。 所述轴 25可为 钢管, 所述导磁环 5可为钢环, 所述第二限位环 7的材料也可为钢。 所述永磁环 4和 导磁环 5的数目根据轴 25的长度、 永磁环 4和导磁环 5的宽度决定, 一般都有多个。 如图 9、 10所示, 在一个实施例中, 所述动子 2还包括轴承 6, 所述轴承 6套在轴 25上。 所述轴承 6的外径比永磁环 4、 导磁环 5、 第二限位环 7的外径大, 起到保护永 磁环 4、 导磁环 5、 第二限位环 7的作用。 如图 2所示, 所述轴承 6包括塑胶轴承 61 和导磁轴承 62,所述塑胶轴承 61套在导磁轴承 62外圈。所述塑胶轴承 61由高分子耐 磨材料制成, 以减小磨擦系数。 所述导磁轴承 62可为钢轴承。 所述第二限位环 7 (第二限位环 7的结构与第一限位环 16的结构相同, 可参考图 6-8 ) 包括由第三箍弧 71、 第四箍弧 72组成的压箍, 所述第三箍弧 71和第四箍弧 72 的弧度和略小于整圆弧度, 所述第三箍弧 71和第四箍弧 72固定接合以紧箍在所述轴 25上。 在一个实施例中, 所述第三箍弧 71、 第四箍弧 72大体上均呈半圆环状。 所述 第三箍弧 71上设有连通外侧部和端部的第四通孔 73, 所述第四箍弧 72的相应端部设 有第四螺孔 74, 第四螺丝 (图未示) 穿过所述第四通孔 73并锁紧在所述第四螺孔 73 上以将所述第三箍弧 71和第四箍弧 72固定接合。 当然, 根据需要, 用户可以设计出三个或更多箍弧组成一个完整的限位环。 只要 这些箍弧的弧度和略小于整圆弧度即可。 在另外的实施例中, 所述第二限位环 7也可以是其它结构, 如由位于动轴上的圈 状凸起构成。 如图 9所示, 在一个实施例中, 所述导磁环 5、第二限位环 7中至少一者的外径比 永磁环 4的外径略大。 这样, 在轴承 6磨损后, 导磁环 5和第二限位环 7中至少一者 就可为永磁环 4提供保护 如图 9所示, 在某个实施例中, 所述动子 2还包括压紧螺母 8, 所述动轴端部设有 螺纹 3, 所述压紧螺母锁紧在所述螺纹 3上。 压紧螺母能保证轴 25上的永磁环 4、 导 磁环 5、 第二限位环 7和轴承 6的锁紧力。 如图 9所示, 如果永磁环 4和导磁环 5的数目很多, 那么所述第二限位环 7可设 置多个, 各个第二限位环 7均匀分离地固定在轴 25上。 即在所述轴 25上, 每隔规定 距离就设置一个第二限位环 7, 并在靠近压紧螺母 8处也设置第一限位环 16进一步增 强对永磁环 4和导磁环 5的轴向限位。 如图 9所示, 所述动轴为中空式, 从而起到增强强度、 潜油呼吸的作用或直接作 为油路的一部分。 所述螺纹 3还可用于连结抽油泵的柱塞总成。所述接头 10上的内螺纹 102还可用 于连结抽油泵的泵筒总成。 如图 1所示, 上述潜油直线电机的工作原理如下: 由于本发明的潜油直线电机在油井下工作, 并与抽油泵连接。 本发明通过在其定 子的定位内管、 定位外管端部设置有接头, 该接头均通过密封圈与定子内管、 定子外 管紧配合并与定子内、 外管共同形成一密闭腔室, 确保了对设置于定子内管、 定子外 管之间的硅钢环和线圈的密封性能。当定子 1的线圈 14线圈 14通三相电后, 线圈 14、 与其配合布置的硅钢圆环 15将产生定子行波磁场, 与动子 2相互作用将电磁能转换成 机械能, 产生推力使动子 2在定子 1 内上下运动。 从而带动抽油泵上下运动, 可将地 下原油通过抽油泵被源源不断抽到抽油管内, 并从抽油管输送到地面装置内。 本发明 的潜油直线电机可使定子保持完全密封, 阻隔了外部油、 水等的进入, 从而保证了位 于定子内部的动子在无妨碍的条件下作上下运动, 由于无需传统的长的抽油杆, 大大 提高了系统工作效率。 本发明的潜油直线电机在定子外管和定子内管之间填充有固体绝缘材料,从而确 保了定子内部线圈部件的高绝缘性, 保证潜油直线电机的正常稳定工作。 以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明, 不能认定 本发明的具体实施只局限于这些说明。 例如, 本发明的定子不但可以作为潜油直线电 机的定子, 还可以是其它任何需要对定子中的线圈部分进行密封的直线电机的填充有 绝缘材料定子。 对于本发明所属技术领域的普通技术人员来说, 在不脱离本发明构思 的前提下, 还可以做出若干简单推演或替换, 都应当视为属于本发明的保护范围。

Claims

权 利 要 求 书
1.一种潜油直线电机, 包括定子(1 )及在该定子(1 ) 内作直线运动的动子(2), 所述定子 (1 ) 包括定子内管 (11 )、 套设在所述定子内管 (11 ) 外的定子外管 (9) 以 及设置于所述定子外管 (9)和所述定子内管 (11 )之间并沿其轴向排布的复数节硅钢 环 (15) 和线圈 (14), 其特征在于,所述定子外管 (9) 和所述定子内管 (11 ) 之间填 充有固体绝缘材料。
2.如权利要求 1所述的潜油直线电机,其特征在于,所述绝缘材料为环氧树脂。
3.如权利要求 1所述的潜油直线电机, 其特征在于,所述线圈 (14) 具有绝缘外 壳。
4. 如权利要求 1所述的潜油直线电机,其特征在于,还包括设置于所述定子外管 (9)和定子内管(11 )端部的至少一接头(10), 所述接头(10)与所述定子外管(9) 和定子内管 (11 ) 紧配合以在三者之间形成密封腔。
5.如权利要求 4所述的潜油直线电机, 其特征在于, 在所述接头 (10)分别与定 子外管 (9) 与定子内管 (11 ) 的接合处均设有密封圈 (12)。
6.如权利要求 5所述的潜油直线电机, 其特征在于,在所述接头 (10) 分别与所 述定子内管 (11 )及定子外管 (9 )相接的周面的至少一者上开设有环形槽 (103), 所 述密封圈 (12) 位于该环形槽 (103) 内。
7.如权利要求 4所述的潜油直线电机, 其特征在于, 所述定子外管的端面开设有 第一螺孔 (91 ), 所述接头 (10 ) 的侧部开设有沉槽 (101 ), 所述沉槽内开设有与所述 第一螺孔 (91 ) 对应、 并连通所述沉槽 (101 ) 的第一通孔 (105)。
8.如权利要求 4所述的潜油直线电机, 其特征在于, 所述定子外管 (9) 与接头 间设有胶类的垫片 (17)。
9.如权利要求 4所述的潜油直线电机, 其特征在于, 所述接头 (10) 与定子外管 (9) 的外周面的相接部位 (22) 以及所述接头 (10) 与定子内管 (11 ) 的内周面的相 接部位 (23) 至少一者焊接成无缝状态。
10.根据权利要求 1所述的潜油直线电机, 其特征在于: 还包括设置于所述定子 外管 (9) 和定子内管 (11 ) 之间的第一限位环 (16 ), 所述第一限位环 (16) 紧固安 装在所述定子内管 (11) 上, 用于对所述硅钢环 (15) 和线圈 (14) 进行限位。
11.根据权利要求 10所述的潜油直线电机, 其特征在于: 所述第一限位环 (16) 包括弧度之和略小于整圆弧度的第一箍弧 (16a)和第二箍弧 (16b), 所述第一、 二箍 弧 (16a, 16b) 固定接合以紧箍在所述定子内管 (11) 上。
12.根据权利要求 9所述的潜油直线电机, 其特征在于: 所述第一箍弧(16a) 的 侧部开设有连通其端部的第二通孔 (162), 所述第二箍弧 (16b) 的相应端部开设有第 二螺孔 (163), 穿过所述第二通孔 (162) 并锁付在所述第二螺孔 (163) 上的第二螺 丝将所述第一箍弧 (16a) 和第二箍弧 (16b) 固接。
13. 根据权利要求 1-12任一所述的潜油直线电机,所述动子(2)包括轴(25)、 永磁环 (4)、 导磁环 (5) 和第二限位环 (7), 所述永磁环 (4) 和导磁环 (5) 阵列排 布在轴 (25) 上, 所述第二限位环 (7) 固紧安装在轴 (25) 上, 用于对轴 (25) 上的 永磁环 (4) 和导磁环 (5) 进行轴向限位。
14.根据权利要求 12所述的潜油直线电机, 其特征在于: 所述第二限位环 (7) 包括第三箍弧 (71)、 第四箍弧 (72), 所述第三箍弧 (71) 和第四箍弧 (72) 的弧度 和略小于整圆弧度, 所述第三箍弧 (71) 和第四箍弧 (72) 固定接合以紧箍在所述轴
(25) 上。
15. 根据权利要求 14所述的潜油直线电机, 其特征在于: 所述第三箍弧 (71) 上设有连通外侧部和端部的第四通孔 (73), 所述第四箍弧 (72) 的相应端部设有第四 螺孔 (74), 穿过所述第四通孔 (73) 并锁紧在所述第四螺孔 (74) 上的第四螺丝将所 述第三箍弧 (71) 和第四箍弧 (72) 固定接合。
16. 根据权利要求 14所述的潜油直线电机, 其特征在于: 所述动子 (2) 还包 括轴承 (6), 所述轴承 (6) 套在轴 (25) 上, 所述轴承 (6) 的外径比永磁环 (4)、 导磁环 (5)、 第二限位环 (7) 的外径大。
17. 根据权利要求 14所述的潜油直线电机, 其特征在于: 所述轴承 (6) 包括 塑胶轴承 (61) 和导磁轴承 (62), 所述塑胶轴承 (61) 套在导磁轴承 (62) 外圈。
18. 根据权利要求 14所述的潜油直线电机, 其特征在于: 所述导磁环(5)、 第 二限位环 (7) 中至少一者的外径比永磁环 (4) 的外径大。
19. 根据权利要求 14所述的潜油直线电机,其特征在于:还包括压紧螺母(8), 所述轴 (25) 的端部设有螺纹 (3), 所述压紧螺母 (8) 锁紧在所述螺纹 (3) 上。
20. 根据权利要求 14所述的潜油直线电机, 其特征在于: 所述轴(25)为中空 式。
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CN109854475A (zh) * 2019-04-04 2019-06-07 河北国创石油设备有限公司 一种直线潜油举升机组
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